Automatic train-stopping device.



H. 'LNDRETW ,AUTGMAUC TRMN STOPPING EVICE.

APPLlcAnon man sinn, 1915.

Patente@ 351m. 9, 7193.7.

5 SHEETS-SHEET i.

H. LANGRETH. AUTMMIC HAI STOPPING DEVICE. APPucmmra man swr. 25, 1915.

Patente Jan. 9, 1917.

5 SHEETS-SHEET 2- 1 am i c, 1:

IH. LANDRETH. UTUMATIC TRAIN STOPPING DEVICE.

APPLICATION FILED SEPT. 25, 19I5.

Patnted Jan. 9, 1917.

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5 smaETsfsHEET 5.

'shaft 22 of a motor 23 and meshes with the gear 21. Thus 1t will beseen that when the motor 23 is energized 'the cam 14 will raise theplunger 7 intermittently and allow the air to escape through the duct 6.Commu nicating with this duct 6 is a pipe 24 which extends to the cab ofthe locomotive and is provided with a suitable whistle 25 so that theexhausting air will blow the whistle and notify the engineer of thedanger ahead.

Secured to the end of the casing l oppo- `site to that on which thevalve 3 1s secured is a pipe 26 which is supported by suitable hangersand has a hollow rod 27 slidably mounted therein on the end of which isa bracket 28 having a roller 29 between the legs thereof. This roller isnormally pressed away lroin the pipe 26 and into engagement with ametallic'band 30 on the inside of the adjacent car wheel by a coilspring 3l. lt must be here stated that the car wheel which is indicatedby 32 on the drawings should be made of papier inach.-

A conducting wire 32 is connected to the motor 23 and to the roller 29and extends' through the pipe 26 and the `rod 2% A second wirev 33 isconnected to the motor, extends through the pipe and the red '2T and issuitably connected to a metallic roller 34 which is mounted on a bracket35 supported by the car sill 3b. This roller 34 is normally presseddownwardly into engagement with the metallicv iiange 37 on` the wheel 32by a coil spring 38. ln order that these'rollers 29 and :i4 may beincluded in an electrical circuit at the proper times so as to energizethe motor 23 and cause the inter mitteilt closing of the valve 3 haveprovided the following mechanism:

Arranged adjacent one of the rails indicated by the reference character39 is a series of casings 40, ea'ch casing being located in actualpractice at a distance substantially three-hundred feet from the nextadjacent casing. Extending longitudinally of each of these casings 40 isa channel 4l which is backed by a strip 42 secured to anges 43 bysuitable means. Slidably mounted at a plurality of points in each othese casings 40 are rods 43 which extend outwardly through the'channel41 and have a rail 44 `secured thereto. This rail is provided at itsends with outwardly turned portions 45 and the body of the rail isypuished normally to the position adjacent tc the wheel rail 39 by a.plurality of springs 46 which encircle -the rods 43. The 'inwardmovement oij this rail is limited by the contacting of an adinstable nut47 on each o the rods 43 with the rear face of the casing 40. Thedistance between therail' 44 and the wheel rail 44 is slightly less thanthe width ofthe wheel flange for a purpose which will later appear.

Secured to the rail 44 between each of the rods e3 and extending towardeach casing 40 is a switch blade 48 which is adapted to enter betweenthe blades 49 in each casing upon the movement of the rail 4,4 towardthe casing.

Connected to each of the blades 49 is a wire 50 which is connected toone pole of a suitable source of supply, preferably bat teries. Thesewires 50 extend through a pipe 51 which extends parallel with the rail44 between it and the casing 40.

li/llounted. between the casing 40 and the wheel rail of the track is abar 52, which is clearly shown in Fig. l of the drawings, which bar isprovided with a switch blade 53. Mounted upon the base of the rail is aplate 54 which is rovided with switch blades 55 between w ich the blade53 is adapted to extend. The plate 54 and the bar 52 are provided with alurality of these switch blades. The switch lades 53 are connected tothe wheel rail by a wire 56 while the blades 55 are connected to thewire .50.

determined distance o each other a circuit is formed, see Fig. 5, from abattery 55 through the wire 50 to the rail 44, through the rail 44 tothe band 30 on the wheel 32, to the contact roller 29 through the wire32', through the motor 2l', through the wire 33, through the roller 34,through the metallic rim 37 to the wheel' rail, through the wheel railto the metallic rim on the wheel of the other car which is indicated bythe reference character 59, through the said rim to the bar 52, throughthe bar 52 and switch plates 53 and 55 and back through the wire 50 tothe battery 58. Thus the motor will be energized.

In Fig. 3 of the drawings have illustrated the rails of a track whichinclude a plurality of sections 60 which are insulated from each otherby suitable material 61. The parts which havebeen previously describedare indicated by the reference charactors by which they were designated,in this Fig. 3. It will be noted that the wiring system is divided intoblocks and each section 60 of the rails has a complete system. It willalso be noted that these complete systems are arranged so as to overlapeach other and thus insure the stopping of trains when they arepredetermined distances apart irrespective of their positions in theblocks. x

While I have illustrated and described va particular embodiment of myinvention it as merely been for the sake of convenience and I do notwish to be limited to that particular embodiment as it 1is olwious thatnu- 1,211,720 i ze merous changes may be made in the details ofconstruction Without departing from the spirit of the inventionv orWithout exceeding the scope of the claims. v

What I claim is l. In a train stopping device adapted to be mounted on acar having an air brake system therein, a valve connected to said airbrake system, e, motor for opening and closing said Valve an electricalcircuit including .one Wall of the car, the rail on-which the energizedrails and the Wheel be completed.

flange of a wheel of a train is interposed between the wheel rail and'one of the energized rails andthe flange of a v/eel of another trainenters between anoer'ff the 3. In a train stopping devi theA combinationwith the tra-in pipe, of anl air brake system, of a valve for releasingthe air therefrom, means for operating said valve to open the same, thesaid means being includ ed in an electric circuit, said 'circuiincludlng an energized rail end a wheel rail, resilient means for maintainingthe energized rail in slight spaced relation to the wheel rail so thatwhen the ange of a Wheel enters between the other rail and the energizedrail it will contact with each and the circuit will In testimony`whereof, .I 'aiin my signature, in the presence of two witnesses.y t

RY DRE'IH.

Witnesses: v S N

